JPS6015957Y2 - Spring mounting structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spring mounting structure used in, for example, an air conditioner for an automobile.

For example, when the entire device is subject to vibration, such as an automobile air conditioner, when maintaining the close contact between the door installed in various ducts and the door patch, springs are usually used to provide elasticity. It is intended to ensure this close contact.

FIG. 1 is a schematic diagram showing an intake unit portion of an air conditioner for an automobile to which a spring is applied to constantly apply elasticity to the door.

The duct 10 of this intake unit has an intake door 11 inside, and this door 11 is operated by a negative pressure actuator 12, and an inside air circulation port 13 and an outside air intake port 14 are operated.
It is designed to selectively switch between the two.

When the solenoid valve 16 is opened in response to a signal from the auto amplifier 15 that electrically controls the automotive air conditioner, negative pressure from the vacuum source 17 is guided inside the negative pressure actuator 12, and the diaphragm 1
8 membranes move.

One end of a rod 19 is connected to this diaphragm 18, and the membrane movement is transmitted to a link 20 by this rod 19, and the intake door 11 is opened and closed via this link 20.

However, if this intake door 11 does not come into close contact with the contact portion 21 or 22 of the duct 10,
Air leaks from either side and proper heating and cooling cannot be achieved.

Therefore, the fixed part 23 of the casing etc. of the air conditioner
A coil spring 24 is interposed between a pin 25 fixed to the link 20 and the link 20 to improve the tightness between the intake door 11 and the contact portion.

However, as shown in FIG. 2a, this spring 24 has annular hooks 26 and 27 at both ends, and one hook 26
is locked to the pin 25, and the other hook 27 is locked to a hole 28 formed in the link 20.

Therefore, one hook 27 in the spring 24 is
As shown in the figure, it comes into contact with the edge of the hole 28 of the ring 20 under pressure (depending on the shape of the hook 27 and the size of the hole 28, there may be a line contact).

Then, as shown in FIG. 2b, when the link 20 rotates from position A to position aperture, at position A, the contact point of hook 27 to link 20 is A, and at position aperture, the contact point is A. It is B.

That is, the contact point of the hook 27 with the link 20 moves from A to B as the hook 27 rotates, as shown in FIG. 2c.

This movement is caused by the hook 27 rubbing against the edge of the hole 28, and at this time a so-called squeak is generated.

The present invention aims to eliminate the above-mentioned defects of the prior art and provide a spring mounting structure that does not generate squeaks. In a spring mounting structure in which a hook at the other end of the stopper is locked to a locking member provided in a fixed position, one end of either or both of the link or the locking member is bent to form a flange portion. The flange portion is provided with a notch recess for locking the hook portion, and a tongue piece formed on the distal end side of the flange portion from the notch recess is inserted into the opening of the hook from the plate surface of the flange portion. furthermore, a spring is attached to the notch recess of the flange part so that the contact between the hook part and the flange part is a point contact; It is characterized in that the spring is used within a rotation range.

As a result, the spring is attached to the flange portion in point contact within the rotation range of the link, so that within the rotation range of the link, the spring only rotates using this point contact portion as a fulcrum and the notch recess is closed. No internal rubbing.

Therefore, the squeaks that occur in conventional mounting structures can be prevented.

Hereinafter, embodiments of the present invention will be described based on FIGS. 4 and 5.

An embodiment of the present invention shown in FIG. 4 is used to bring the intake door 11 into close contact with the contact portion 21 or 22 of the duct 10, similar to the embodiment shown in FIGS. 1 and 2.

Components in the drawings that are the same as those shown in FIGS. 1 and 2 will be described with the same reference numerals.

This spring mounting structure is used when the spring 24 is stretched between the link 20 and the locking member, and in this embodiment, the locking member is a pin 25.

The link 20 rotates within a predetermined range about a rotation axis O, and the intake door is opened and closed by this rotation.

As shown in Figure 4s5a, the rotation axis O of this link 20
On the other hand, the side that is locked by the spring 24 has an oval shape, and the end thereof is bent at a substantially right angle to the main body of the link 20 to form a flange portion 29.

A spring 24 having hooks 26 and 27 at both ends is locked between the flange portion 29 and the fixed position pin 25.

In particular, a notch recess 30 for locking the hook 27 is formed in this flange portion 29, and by forming this notch recess 30, a tongue piece 31 is formed on the distal end side of the flange portion.

The flange portion 29 and the hook 27 are attached in a locked state such that the hook 27 makes point contact with the edge portion of the thickness of the plate in the cutout recess 30 of the flange portion.

This locked state of point contact is always maintained within the rotation range of the link 20.

In addition, since the hook 27 is attached in point contact with the cutout recess 30 of the flange portion 29 that is bent at right angles from the surface of the link 20 in this way, it is inevitable that the hook 27 will The formed surface and the raised surface of the flange 29 are in a perpendicular relationship.

That is, unlike the above-mentioned example in which the hook is attached to a hole drilled in a link, the hook 27 of this embodiment is
The conventional mounting has a positional relationship rotated by 90' relative to the state.

Therefore, in the present invention, the spring 2 processed into such a shape
4 will be used.

Further, the tongue piece 31 is curved so that when the hook 27 is locked in the notch recess 30, the tip of the tongue piece 31 faces the main body of the link 20, that is, the opposite side of the opening 32 of the hook 27. or bent.

This is to prevent the hook 27 from coming off the notch recess 30 even when the link 20 rotates.

Next, the operation of this mounting structure will be explained.

As shown in FIG. 5a, the link 20 has a rotation range from position A to position B about the rotation axis O.

In position A, as shown in FIG.
Point contact is made at an obtuse angle to the axial direction of the plate 9 and at an acute angle to the plate thickness direction.

Therefore, the distance H□ between the hook 27 and the inner surface of the flange portion 29 on the link body side is relatively wide, and the distance H2 between the plate thickness surface of the flange 29 on the notch recess side is relatively narrow.

Next, when the link 20 rotates and comes to position B, the hook 27 rotates about the contact point There will be point contact.

Therefore, the spacing H1 is relatively narrow and H2 is relatively wide.

In this way, since the hook 27 and the flange portion 29 are in point contact, as the link 20 rotates, the hook 27 rotates using the contact X as a fulcrum, so there is no possibility of rubbing at the contact portion. .

This completely prevents the generation of squeaks caused by friction at the contact portion between the hook and the flange.

The mounting structure of the present invention includes the hook 27 and the flange portion 29.
It is effective only within the rotation range of the link where point contact can be maintained; if the rotation range becomes too wide, it will result in two-point contact, causing squeaks.

That is, in the present invention, it is necessary to use the distances H1 and H2 between the hook 24 and the flange 29 within the rotation range of the link that can be taken at the same time, and within the range that satisfies this condition, the link shape attachment is determined by the position and spring. The installation position should be determined appropriately.

Usually, the various doors attached to automobile air conditioners are
Since the rotation range is relatively narrow, it is extremely effective to apply the present invention to this device.

Furthermore, when the link 20 rotates to the B position, the fifth
As is clear from Figure A, the hook 27 is at an extremely acute angle with respect to the width direction of the flange portion 29, so if the tongue piece 31 is not curved or bent, the hook will break when strong vibration is applied. 27 may come off from the notch recess 30.

For this reason, the tongue piece 31 is curved or bent as described above, so that the hook 27 will not come off.

Moreover, in order to lock the hook 27 to the flange portion 29 of the link 20, it is only necessary to hook the hook 27 into the notch recess 30, and there is no need to penetrate the hook 27 into the hole 28 as in the conventional case. The spring 24 can be attached.

The one shown in FIG. 4 has a tongue piece 31 on only one locking member.
However, it is also possible to provide this on both locking members, and the present invention is applicable not only to automobile air conditioners, but also to places where vibrations, rocking, etc. occur, such as machine tools. It goes without saying that it can be widely used as a fixture for springs that need to be installed.

As is clear from the above description, according to the present invention, one end of either the link or the locking member or both is bent to form a flange portion, and the hook portion is engaged with the flange portion. Each time a notched recess is provided, a tongue piece formed on the distal end side of the flange portion from the notched recess is curved from the plate surface of the flange portion to the side opposite to the opening of the hook; A spring is attached to the notch recess of the flange part so that the contact between the part and the flange part is a point contact, and the spring is used within a predetermined rotation range in which this point contact can be maintained. Within the rotational range of , the spring only rotates around the point contact part as a fulcrum and does not rub, so there is no squeak like in the conventional case.

Moreover, the work of hooking can be done quickly.

Furthermore, since the structure is simple, even if this fixture is adopted, it does not lead to an increase in the cost of the product and has extremely excellent effects.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the usage state of the conventional spring mounting structure.
Figure 2a is a perspective view showing the main part of Figure 1, Figure 2b is a diagram showing the relationship between the movement of the link and spring in Figure 2a, and Figure 2c is a diagram showing the relationship between the link and the spring in Figure 2a.
The figure is an enlarged view of the main part of Figure 2b, and Figure 3 is from ■-■ of Figure 2.
4 is a perspective view showing an embodiment of the present invention; FIG. 5a is a schematic view showing a state in which the hook of the spring is retained;
FIG. 5b is an enlarged view of the main part of FIG. 5a. 24... Spring, 25... Pin, 26,
27... Hook, 29... Flange portion, 30... Notch recess, 31... Tongue piece.

Claims (1)

[Scope of utility model registration request] In a spring mounting structure in which a hook at one end is locked to a link having a predetermined rotation range and a hook at the other end is locked to a locking member provided in a fixed position, the link or locking member A flange portion is formed by bending one or both ends of the flange portion, and the flange portion is provided with a notch recess for locking the hook portion, and the tip of the flange portion is extended from the notch recess to the distal end side of the flange portion. The formed tongue piece is curved toward the side opposite to the opening of the hook from the plate surface of the flange portion, and the flange portion is further bent so that the contact between the hook portion and the flange portion is a point contact. A spring mounting structure characterized in that a spring is mounted in the notch recess of the part, and the spring is used within a predetermined rotation range in which this point contact can be maintained.